Accountability should sit with the team that owns the secret store, the identity controls, and the lifecycle of the accessing identity. If a vault is unmanaged, accountability becomes unclear fast, which is why governance, audit, and offboarding responsibilities must be explicit before an incident occurs.
Why This Matters for Security Teams
Unmanaged vault access turns a secret store into an unresolved ownership problem: if the vault, the identity that reaches it, and the offboarding path are not clearly governed, breach response quickly becomes a debate about responsibility instead of containment. That is why NHI Management Group treats secret lifecycle control as an operational control, not a tooling preference. The pattern shows up repeatedly in the 52 NHI Breaches Analysis and in the Guide to the Secret Sprawl Challenge, where hidden dependencies and stale access routinely outlast the systems they were meant to protect.
Security teams often get this wrong by assigning accountability only at the application layer, while the real exposure sits in the vault, the issuing identity, or the automation that never got decommissioned. That gap matters because unmanaged vault access can expose API keys, certificates, and tokens across multiple systems at once, making the blast radius far larger than a single application incident. The OWASP Non-Human Identity Top 10 and NIST Cybersecurity Framework 2.0 both reinforce the need for explicit ownership, access governance, and auditability across identity-dependent services. In practice, many security teams encounter accountability failures only after a vault credential has already been used outside its intended lifecycle, rather than through intentional governance review.
How It Works in Practice
Accountability should be mapped across three control points: the secret store owner, the identity owner, and the business owner of the workload that consumes the secret. That mapping matters because unmanaged vault access usually fails in the handoff between provisioning and retirement. A strong operating model assigns a named owner for vault policy, approval flow, monitoring, and revocation, then ties each secret to the workload or NHI that is allowed to use it. The Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs is useful here because lifecycle ownership is the point where many breaches become preventable instead of ambiguous.
Practically, the controls should include:
- Named vault ownership with documented approval authority for creation, rotation, and revocation.
- Identity-to-secret mapping so every access path is traceable to a workload, service account, or agent.
- Time-bound access reviews that validate whether the consumer still exists and still needs the secret.
- Automated offboarding so revoked identities cannot continue to retrieve vaulted credentials.
- Central logging that records who approved access, who used it, and when it was removed.
Where teams need a policy baseline, current guidance from the NIST Cybersecurity Framework 2.0 supports clear governance and asset accountability, while the OWASP Non-Human Identity Top 10 highlights the operational risk of unmanaged non-human credentials. These controls tend to break down in fast-moving CI/CD environments where secrets are copied into pipelines faster than ownership, rotation, and decommissioning can be verified.
Common Variations and Edge Cases
Tighter vault governance often increases operational overhead, so organisations have to balance faster delivery against stronger accountability. That tradeoff becomes especially visible when multiple teams share the same vault, or when a platform team runs the store but application teams create the secrets. In those cases, best practice is evolving rather than universally settled, and responsibility should be documented in a RACI-like model so no one assumes another team is watching the lifecycle.
There are also edge cases where the obvious owner is not the actual control owner. For example, a third-party service may consume the secret, but the internal team still owns the vault policy and offboarding path. If the secret is tied to an automated process, the identity owner may be a platform or SRE team rather than the application team. The most useful audit question is not “who used the secret?” but “who could revoke it before it was abused?” That framing aligns with the Ultimate Guide to NHIs — Regulatory and Audit Perspectives and helps teams close the accountability gap before it turns into dispute. The exception is legacy estates with shared administrative vaults, where ownership is often so fragmented that remediation must start with inventory before accountability can be enforced.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Unmanaged vault access is a core non-human identity ownership and governance failure. |
| NIST CSF 2.0 | GV.OV-01 | Governance and accountability are central when breach ownership is unclear. |
| NIST CSF 2.0 | PR.AA-01 | Identity proofing and access control underpin who can reach secrets. |
Assign each vault-backed NHI a named owner and require traceable approval for creation, use, and revocation.
